Guild Wars 2

Is there any Lore regarding the Legendary Weapons?
I’d seriously love to learn more how they were created, by whom (and to whom), in which circumstances, what for and all that..

Not yet. I say yet because I think we all hope they will create a backstory, but for now it’s just your imagination

I always figured that Zommoros used his mighty Djinn powers to craft them from the various gifts we bring him. That or he is just holding on to the weapons themselves and only hands them out to worthy heroes who can craft him such amazing gifts.

Zommoros is very wise and travelled far and long before he was caught in the mystic forge. I see him as a crafter of things long forgotten. some things he makes we still remember, but the legendary weapons are mostly things only he knows bout. How he knows?? well I guess there is a story to tell for all of the weapons

Flameseeker Prophecies holds a transcript of Meerak the Shouter’s dialogue in GW1 (one of the prophecies, effectively, mixed in with some crazies), along with murals on the signs possibly depicting various parts of said Prophecies.

The rest… I know nothing about any (possible) background lore. Except Rodgort, which was a name in various Elementalist fire skills in GW1.